$full: 100%;

@mixin wh($w,$h) {
    width: $w;
    height: $h;
}

@function half($param) {
    @return $param/2;
}

@function percent($param1,$param2) {
    @return ($param1/$param2);
}

$fontsize: 40;

@function r($px) {
    @return ($px/$fontsize)*1rem;
}
